Europhys. Lett.
Volume 70, Number 5, June 2005
Page(s) 656 - 662
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 29 April 2005
Europhys. Lett., 70 (5), pp. 656-662 (2005)
DOI: 10.1209/epl/i2004-10516-7

Interband magneto-optical transitions in a layer of semiconductor nano-rings

O. Voskoboynikov1, C. M. J. Wijers2, J. L. Liu3 and C. P. Lee1

1  Department of Electronic Engineering and Institute of Electronics National Chiao Tung University - 1001 Ta Hsueh Rd., Hsinchu 300, Taiwan
2  Faculty of Applied Science, Twente University - P.O. Box 217 7500 AE Enschede, The Netherlands
3  Department of Applied Mathematics, National Chiao Tung University 1001 Ta Hsueh Rd., Hsinchu 300, Taiwan

received 12 November 2004; accepted in final form 12 April 2005
published online 29 April 2005

We have developed a quantitative theory of the collective electromagnetic response of layers of semiconductor nano-rings. The response can be controlled by means of an applied magnetic field through the optical Aharonov-Bohm effect and is ultimately required for the design of composite materials. We demonstrate that the local field is of paramount importance in the description of such layers. The changes in ellipsometric parameters are 2 to 3 orders of magnitude above the detection limit of a modern ellipsometer.

73.21.-b - Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems.
75.20.Ck - Nonmetals.
75.75.+a - Magnetic properties of nanostructures.

© EDP Sciences 2005